Changeset 9667 for NEMO/trunk/doc
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 20180528T17:47:05+02:00 (3 years ago)
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NEMO/trunk/doc/tex_sub/chap_LBC.tex
r9407 r9667 137 137 138 138 At the model domain boundaries several choices are offered: closed, cyclic eastwest, 139 south symmetric across the equator, a northfold, and combination closednorth fold140 or cyclicnorthfold. The northfold boundary condition is associated with the 3pole ORCA mesh.139 cyclic northsouth, a northfold, and combination closednorth fold 140 or bicyclic eastwest and northfold. The northfold boundary condition is associated with the 3pole ORCA mesh. 141 141 142 142 %  143 % Closed, cyclic , south symmetric(\np{jperio}\forcode{ = 0..2})143 % Closed, cyclic (\np{jperio}\forcode{ = 0..2}) 144 144 %  145 \subsection{Closed, cyclic , south symmetric (\protect\np{jperio}\forcode{= 0..2})}145 \subsection{Closed, cyclic (\protect\np{jperio}\forcode{= [0127]})} 146 146 \label{subsec:LBC_jperio012} 147 147 148 The choice of closed , cyclic or symmetric model domain boundary condition is made149 by setting \np{jperio} to 0, 1 or 2in namelist \ngn{namcfg}. Each time such a boundary148 The choice of closed or cyclic model domain boundary condition is made 149 by setting \np{jperio} to 0, 1, 2 or 7 in namelist \ngn{namcfg}. Each time such a boundary 150 150 condition is needed, it is set by a call to routine \mdl{lbclnk}. The computation of 151 151 momentum and tracer trends proceeds from $i=2$ to $i=jpi1$ and from $j=2$ to … … 162 162 and the last column to the value of the second one (\autoref{fig:LBC_jperio}a). 163 163 Whatever flows out of the eastern (western) end of the basin enters the western 164 (eastern) end. Note that there is no option for northsouth cyclic or for doubly 165 cyclic cases. 166 167 \item[For symmetric boundary condition across the equator (\np{jperio}\forcode{ = 2})], 168 last rows, and first and last columns are set to zero (closed). The row of symmetry 169 is chosen to be the $u$ and $T$points equator line ($j=2$, i.e. at the southern 170 end of the domain). For arrays defined at $u$ or $T$points, the first row is set 171 to the value of the third row while for most of $v$ and $f$point arrays ($v$, $\zeta$, 172 $j\psi$, but \gmcomment{not sure why this is "but"} scalar arrays such as eddy coefficients) 173 the first row is set to minus the value of the second row (\autoref{fig:LBC_jperio}b). 174 Note that this boundary condition is not yet available for the case of a massively 175 parallel computer (\textbf{key{\_}mpp} defined). 164 (eastern) end. 165 166 \item[For cyclic northsouth boundary (\np{jperio}\forcode{ = 2})], first and last columns are set 167 to zero (closed) whilst the first row is set to the value of the lastbutone row 168 and the last row to the value of the second one (\autoref{fig:LBC_jperio}a). 169 Whatever flows out of the northern (southern) end of the basin enters the southern 170 (northern) end. 171 172 \item[Bicyclic eastwest and northsouth boundary (\np{jperio}\forcode{ = 7})] combines cases 1 and 2. 176 173 177 174 \end{description}
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